Eaton STS366FW64 Shunt Trip Safety Switch - NEMA 4X
Part Number: STS366FW64
Quick Summary
Eaton shunt trip safety switch is a rapid, remote-actuation protection device designed for motor control centers. In demanding plants, nuisance trips or slow emergency shutdowns can erode productivity; this unit delivers fast, reliable control when it matters most. The product carries UL Listed and cUL Certified marks, with a NEMA 4X enclosure and 304 stainless steel body for washdown and harsh environments. Its three-pole, 600 A rating paired with a 24 Vdc coil supports both legacy and modern control schemes, while the 1 NO 1 NC auxiliary contact enables flexible signaling. For procurement teams, this translates into reduced downtime, clearer fault indication, and simpler regulatory compliance across MCC installations.
Product Information
Extended Description
STS366FW64 Eaton: Eaton shunt trip safety switch, 600 A, Three-pole, 600 Vac, 250 Vdc, Alarm switch, 24 Vdc, 1 NO 1 NC, NEMA 4X, 304 stainless steel, Fusible, 600 V
Product Name
Eaton shunt trip safety switch
Catalog Number
STS366FW64
UPC
786685828916
Product Length/Depth
12.43 in
Product Height
62.97 in
Product Width
28.29 in
Product Weight
145 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
cUL Certified UL Listed
Auxiliary contacts
Alarm switch
Enclosure
NEMA 4X
Enclosure material
304 stainless steel
Number Of Poles
Three-pole
Type
Shunt trip safety switch
Amperage Rating
600A
Coil voltage
24 Vdc
Protection
Fusible
Voltage rating
600 Vac, 250 Vdc
Contact configuration
1 NO 1 NC
Switching Devices Flex Center
Switching Devices Flex Center
Switching Devices Flex Center
Eaton Specification Sheet - STS366FW64
Selling Policy 25-000 - Distribution and Control Products and Services
Feature → Three-pole, 600 A rating with a broad voltage envelope (600 Vac / 250 Vdc) provides robust protection for large motor control centers. This capability translates to fewer devices in service and lower switching complexity, which reduces installation time and inventory costs. Use this in new MCC builds or retrofits where high-current protection and reliable trip signaling are essential. Business Impact → Reduces equipment count and accelerates commissioning in high-demand environments. Application → Large industrial MCCs, pump and fan assemblies, and heavy-duty switchgear. Long-tail keywords integrated: motor control centers protection, high current protection, switchgear reliability, OEM MCC solutions.
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FAQs
STS366FW64 is designed for standard MCC frames with a three-pole configuration and a rugged NEMA 4X, 304 stainless steel enclosure. It supports common switchgear rails and door-mounting panels, with a 12.43 in depth, 62.97 in height, and 28.29 in width footprint. It accepts a remote 24 Vdc control signal and includes a 1 NO 1 NC auxiliary contact for signaling, enabling straightforward retrofit into current control architectures.
This model provides a 600 A amperage rating, with 600 Vac / 250 Vdc voltage ratings and a 24 Vdc coil. It is a three-pole device with a fusible protection scheme and a 1 NO 1 NC auxiliary contact, suitable for integration with standard PLC/SCADA control logic in MCCs.
Yes. The STS366FW64 uses a NEMA 4X enclosure and 304 stainless steel construction, offering excellent corrosion resistance and washdown readiness. This makes it well-suited for food & beverage, pharmaceutical, chemical processing, and offshore or outdoor installations where harsh environmental conditions are common.
The device is UL Listed and cUL Certified, providing strong regulatory alignment for North American markets. These certifications, combined with the rugged NEMA 4X enclosure and stainless steel construction, support safe installation in industrial environments and simplify procurement for OEMs and panel builders.
Warranty is Eaton’s policy: one year from installation or eighteen months from shipment, whichever occurs first. The device’s high-current capability, robust enclosure, and signaling options contribute to reduced downtime, faster fault detection, and lower maintenance costs over the life of MCC installations, delivering a favorable total cost of ownership.